![the promis system the promis system](http://s3.amazonaws.com/resources.twubs.com/4412669-150.img.jpg)
Osteoarthritis is a disease characterized by structural changes throughout the joint but it is also an illness of the whole patient defined by patient-reported outcomes such as pain, stiffness, and disability. Floor effects in the PROMIS Anxiety and Depression scores should be considered if needing to distinguish among patients with very low levels of these outcomes. PROMIS Anxiety and Depression target general mental health (e.g., stress, depression), and PROMIS Pain Interference and Physical Function static-short forms target whole-body outcomes among participants with symptomatic knee osteoarthritis. The four PROMIS static-short forms performed well among individuals with symptomatic knee osteoarthritis as evidenced in correlations with legacy measures. PROMIS Physical Function scores had stronger associations with scores on the Short-Form 36 Physical Function ( r = 0.79) than with scores on other legacy measures. PROMIS Pain Interference scores correlated most strongly with measures of whole body pain (Short-Form 36 Bodily Pain, r = −0.73) and physical health (Short-Form 36 Physical-Component Summary, r = −0.73) their correlations were lower with other legacy measures, including with the WOMAC knee-specific pain ( r = 0.47). PROMIS Anxiety and Depression scores had strongest associations with general mental health, including stress (Perceived Stress Scale, r ≥ 0.65) and depression (Beck Depression Index-II, r = 0.70). The PROMIS Anxiety and Depression had floor effects with 17 and 24 % of participants scoring the minimum, respectively. Mean age of the sample was 60 years 70 % were female. Resultsĭata from 204 participants were analyzed. We also estimated the association between PROMIS scores and scores on legacy measures using Spearman’s rank correlations coefficients. We calculated descriptive statistics and percentages of participants scoring the minimum (floor) and maximum (ceiling) possible scores for PROMIS and legacy measures. Participants completed four PROMIS static short-form instruments (i.e., Anxiety, Depression, Physical Function, and Pain Interference) as well as six well-validated (legacy) measures that assess pain, function, and psychological health.
![the promis system the promis system](https://acrabstracts.org/wp-content/uploads/2019/08/GTUOHVCE-700132-1-ANY.png)
![the promis system the promis system](https://img.yumpu.com/3796348/1/500x640/iris-instruments-promis.jpg)
The promis system trial#
We conducted a secondary analysis of baseline data from a randomized trial comparing Tai Chi and physical therapy. The aim of this project was to evaluate the construct (structural) validity and floor/ceiling effects of four PROMIS measures in this population. No study, however, has evaluated the psychometric function of these measures in individuals with symptomatic knee osteoarthritis (KOA). The psychometric properties of Patient Reported Outcomes Measurement Information System (PROMIS) instruments have been explored in a number of general and clinical samples.